package com.sky.service.impl;

import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

/**
 * @author jingchun
 * @create 2024-04-27 11:06
 */
@Service
@Slf4j
public class UserServiceImpl implements UserService {

    public static final String WX_LOGIN = "https://api.weixin.qq.com/sns/jscode2session";
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WeChatProperties weChatProperties;

    /**
     * 微信登录
     * @param userLoginDTO
     * @return
     */
    public User wxLogin(UserLoginDTO userLoginDTO) {
//        授权码
        String code = userLoginDTO.getCode();
        String openid = getOpenId(code);

        if (openid==null){
            log.error("微信登录失败");
            throw new RuntimeException(MessageConstant.LOGIN_FAILED);
        }

        // 检查用户是否已经存在
        User user = userMapper.getByOneId(openid);

        // 如果用户不存在，则创建新用户
        if (user == null) {
            user = new User();
            user.setOpenid(openid);
            user.setCreateTime(LocalDateTime.now());
            userMapper.insert(user);
        }

        return user;
    }

    private String getOpenId(String code) {
//        请求参数封装
        Map map = new HashMap();
        map.put("appid", weChatProperties.getAppid());
        map.put("secret", weChatProperties.getSecret());
        map.put("js_code", code);
        map.put("grant_type", "“authorization_code");
//        调用工具类,向微信接口服务发送请求
        String json =  HttpClientUtil.doGet(WX_LOGIN, map);
        log.info("微信登录返回结果:{}", json);
//        解析json字符串
        JSONObject jsonObject = JSONObject.parseObject(json);
        String openid = jsonObject.getString("openid");
        log.info("微信用的的openid为:{}", openid);

        return openid;
    }
}
